idnr: 626

	2
			4
4
		3

Difficulty: Very easy (0)

idnr: 603

	1
		2	1
2	3
		4

Difficulty: Super easy (0)

idnr: 688

		1	2
	4
		2
1	2

Difficulty: Super easy (0)

idnr: 835


		4	1
1	3

Difficulty: Super easy (0)